Other Door Applications
While many of the most popular and memorable BBS doors have been games, numerous doors had non-entertainment applications such as user polls or the time bank, permitting users to time-shift their rationed BBS use. Frequently they act as a front-end to themed databases on subject such as astrology, numerology and fortune-telling, recipes, weather prediction, personal ads (sometimes with additional match-making functionality), classified ads and "for sale" listings (sometimes permitting auctions), BBS lists, and parting comments from the most recent BBS callers.
A front end operates as a router for incoming calls to bbs software that are answered by a modem or modems.
Examples of frontends are "Frontdoor" or "Binkleyterm".
Doors are programs that BBS programs such as OPUS, TAG or RA would load.
BBS programs operated and to this very day still do operate independently much like a text only version of symantec's pc anywhere.Read more about this topic: BBS Door
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“There is a doctrine uttered in secret that man is a prisoner who has no right to open the door of his prison and run away.”
—Plato (c. 427–347 B.C.)